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TM 9-2320-364-20-2
2-1454
34. ENGINE BRAKE DOES NOT OPERATE IN LOW (CONT).
Reverse light operates
indicating 10 to 14 vdc to
wire 1871.
Dash lights operate indicating
10 to 14 vdc to circuit
breaker CB7.
Engine brake harness faulty.
Circuit breaker CB7 faulty.
Wire 1712 faulty.
Engine brake switch faulty.
Wire 1713 faulty.
Wire 1711 faulty.
Wire 508 faulty.
DDEC ECM faulty.
TRANS relay R7 faulty.
Wire 1839 faulty.
Wire 211 faulty.
Relay R8 wire 1871 faulty.
Wire 213 faulty.
ATEC ECU faulty.
Retarder relay R8 faulty.
Wire 1716 faulty.
Circuit breaker CB11 wire 1871
faulty.
Wire 1711 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
If continuity is not measured,
engine brake harness is faulty.
YES
NO
Replace engine brake
harness (Para 7-102).
Verify repair, go to
Step 18 of this Fault.
2.
Is continuity measured on
engine brake harness?
Fault not corrected.
Notify DS
Maintenance.
WARNING
Read WARNING
on Page 2-1455
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